Multiple Websites Monitoring with Notifications including Phone Calls

✅ What problem does this workflow solve? Automatically monitor multiple websites every 5 minutes, log downtime, notify your team instantly via multiple channels, and track uptime/downtime in a Google Sheet—without relying on expensive monitoring tools. ⚙️ What does this workflow do? Triggers every 5 minutes to monitor website health. Fetches a list of website URLs from a Google Sheet. Checks the status of each website one by one. Sends instant alerts if a website is down (Email, Slack, Telegram, Voice Call). Logs downtime events in Google Sheets. Tracks when websites are back up and updates the log. Sends recovery notifications when a site is live again (Email, Slack, Telegram). 🔧 Setup 📄

Help me set up the n8n workflow "Multiple Websites Monitoring with Notifications including Phone Calls" (https://n8n.io/workflows/4833). It uses: Google Sheets, HTTP Request, Slack, Telegram, Gmail, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.